<!-- 父级标签:控制除了登录页以外的所有子页面的头部与左侧菜单栏 -->
<template>
  <div style="display: flex">
    <!-- 左侧菜单栏 -->
    <div :style="{ width: isCollapse ? '64px' : '208px' }">
      <el-menu background-color="#3c82f5" :default-active="route.path" active-text-color="#ff0" text-color="#fff" unique-opened router
        style="width: 100%; height: 100vh" :collapse="isCollapse" :collapse-transition="false">
        <el-row style="padding-top: 10px;">
          <el-col :span="2" :offset="0"></el-col>
          <el-col :span="7" :offset="0" style="margin-bottom: 60px; ;">
          </el-col>
          <el-col :span="isCollapse ? 0 : 13" :offset="0">
            <span style="color: #fff;font-weight: bold;position: relative;top: 8px;left: 2px;"> 禾木生活 </span>
          </el-col>
        </el-row>
        <el-sub-menu index="1">
          <template #title>
            <el-icon>
              <User />
            </el-icon><span>账号管理</span>
          </template>
          <el-menu-item index="/admin/Alluser" key="">用户列表</el-menu-item>
          <el-menu-item index="/admin/Allseller" key="">商家列表</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="2">
          <template #title>
            <el-icon>
              <Van />
            </el-icon><span>商品管理</span>
          </template>
          <el-menu-item index="/admin/Allproduct" key="">商品列表</el-menu-item>
        </el-sub-menu>
        <el-sub-menu index="3">
          <template #title>
            <el-icon>
              <Location />
            </el-icon><span>评论管理</span>
          </template>
          <el-menu-item index="/admin/Allreview" key="">评论列表</el-menu-item>
        </el-sub-menu>
      </el-menu>
    </div>
    <div :style="{
      width: isCollapse ? 'calc(100% - 64px)' : 'calc(100% - 208px)',
    }">
      <!-- 右侧顶部条 -->
      <el-header style="padding-top: 22px;background-color: #fff;height:10vh">
        <el-row :gutter="10">
          <el-col :span="18" :offset="0">
            <el-icon style="font-size: 20px;" @click="changeCollapsed">
              <Expand />
            </el-icon>
          </el-col>
          <el-col :span="6" :offset="0" style="position: relative;">
            <el-dropdown trigger="click" style="position: absolute;right: 20px;">
              <span style="font-size: 19px;font-weight: bold;">
                {{user.username}}
                <el-icon>
                  <arrow-down />
                </el-icon>
              </span>
              <template #dropdown>
                <el-dropdown-menu>
                  <el-dropdown-item @click="logout">退出登录</el-dropdown-item>
                </el-dropdown-menu>
              </template>
            </el-dropdown>
          </el-col>
        </el-row>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator="/" style="position: relative;top: 20px;">
          <el-breadcrumb-item >首页</el-breadcrumb-item>
          <el-breadcrumb-item v-for="item in breadcrumb" :key="item">{{ item }}</el-breadcrumb-item>
        </el-breadcrumb>
        
      </el-header>
      <!-- 右侧主体内容(可变区域) -->
      <el-main style="height: 90vh;padding: 0;overflow-y: auto;">
          <router-view></router-view>
      </el-main>
    </div>
  </div>
</template>

<script setup>
import { onMounted, ref } from "vue";
import { useRoute } from "vue-router";
import { useRouter } from "vue-router";
const isCollapse = ref(false);
const user = ref(getUser())
const breadcrumb = ref([])
//定义对象用来维护路由path与面包屑数值组的对应关系
let map = {
  '/admin/Alluser':['用户管理', '用户列表'],
  '/admin/Allseller':['用户管理', '商家列表'],
  '/admin/Allproduct':['商品管理', '商品列表'],
  '/admin/Allreview':['评论管理', '评论列表'],
}

const route = useRoute()
const updateBreadcrumb = (route) => {
  const path = route.path
  breadcrumb.value = map[path]
}
//表示一进到页面就执行这个函数
onMounted(() => {
  //更新面包屑的值
  updateBreadcrumb(route)
})
//获取一个路由对象
const router = useRouter()
//监听路由变化
router.beforeEach((to, from,next) => {
  //更新面包屑的值
  updateBreadcrumb(to)
  next()
})
const logout = () => {
  localStorage.removeItem("user");
  window.location.href = "/login";
  user.value = '';
};
const changeCollapsed = () => {
  isCollapse.value = !isCollapse.value;
};
</script>